ADF4210_15 Datasheet, PDF (1/20 Pages) Analog Devices – Dual RF/IF PLL Frequency Synthesizers

a _{Dual RF/IF PLL Frequency Synthesizers}
ADF4210/ADF4211/ADF4212/ADF4213
FEATURES
ADF4210: 550 MHz/1.2 GHz
ADF4211: 550 MHz/2.0 GHz
ADF4212: 1.0 GHz/2.7 GHz
ADF4213: 1.0 GHz/3 GHz
2.7 V to 5.5 V Power Supply
Separate Charge Pump Supply (V_P) Allows Extended
Tuning Voltage in 3 V Systems
Programmable Dual Modulus Prescaler
RF and IF: 8/9, 16/17, 32/33, 64/65
Programmable Charge Pump Currents
3-Wire Serial Interface
Analog and Digital Lock Detect
Fastlock Mode
Power-Down Mode
GENERAL DESCRIPTION
The ADF4210/ADF4211/ADF4212/ADF4213 is a dual frequency
synthesizer that can be used to implement local oscillators (LO)
in the upconversion and downconversion sections of wireless
receivers and transmitters. They can provide the LO for both
the RF and IF sections. They consist of a low-noise digital PFD
(Phase Frequency Detector), a precision charge pump, a pro-
grammable reference divider, programmable A and B Counters
and a dual-modulus prescaler (P/P + 1). The A (6-bit) and B
(12-bit) counters, in conjunction with the dual modulus prescaler
(P/P + 1), implement an N divider (N = BP + A). In addition,
the 14-bit reference counter (R Counter), allows selectable
REFIN frequencies at the PFD input. A complete PLL (Phase-
Locked Loop) can be implemented if the synthesizer is used with
an external loop filter and VCO (Voltage Controlled Oscillators).
APPLICATIONS
Base Stations for Wireless Radio (GSM, PCS, DCS,
CDMA, WCDMA)
Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA)
Control of all the on-chip registers is via a simple 3-wire interface.
The devices operate with a power supply ranging from 2.7 V to
5 V and can be powered down when not in use.
Wireless LANS
Communications Test Equipment
CATV Equipment
FUNCTIONAL BLOCK DIAGRAM
V_DD1 V_DD2 V_P1 V_P2
R_SET
IF_IN
REF_IN
CLOCK
DATA
LE
RF_IN
IF
PRESCALER
OSCILLATOR
24-BIT
DATA SDOUT
REGISTER
RF
PRESCALER
12-BIT IF
B-COUNTER
8-BIT IF
A-COUNTER
14-BIT IF
R-COUNTER
PHASE
COMPARATOR
REFERENCE
CHARGE
PUMP
CP_IF
IF
LOCK
DETECT
IF CURRENT
SETTING
IFCP3 IFCP2 IFCP1
OUTPUT
MUX
MUXOUT
14-BIT RF
R-COUNTER
12-BIT RF
B-COUNTER
6-BIT RF
A-COUNTER
RF
LOCK
DETECT
RFCP3 RFCP2 RFCP1
IF CURRENT
SETTING
PHASE
COMPARATOR
CHARGE
PUMP
REFERENCE
ADF4210/ADF4211/
ADF4212/ADF4213
R_SET
FL_O SWITCH
CP_RF
FL_O
REV. A
DGND_RF
AGND_RF DGND_IF DGND_IF
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reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
AGND_IF
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© Analog Devices, Inc., 2001